JP2020166998A - Device for manufacturing electric wire with terminal and method for manufacturing electric wire with terminal - Google Patents

Abstract

To provide a device for manufacturing an electric wire with a terminal, capable of improving the anti-corrosion performance of an electric wire with a terminal.SOLUTION: A device 100 for manufacturing an electric wire with a terminal includes: a support stand 40 supporting an electric wire 2 with a terminal from below, the electric wire with a terminal including an electric wire 60 and a crimp terminal 1 crimped to the electric wire; a pumping section pumping a liquid resin; and a moving body 50 which has a concave surface 54b covering the electric wire with a terminal from above and a passage 54g opening to the concave surface and discharging the resin sent from the pumping section, the moving body being driven by a drive section so that it moves relative to the support stand in the vertical direction. A film 90 of the resin is formed on the concave surface by the resin 9 discharged from the passage, and the film of the resin is attached to a core wire 61 of the electric wire.SELECTED DRAWING: Figure 15

Description

The present invention relates to a terminal-equipped electric wire manufacturing apparatus and a terminal-equipped electric wire manufacturing method.

Conventionally, there is a method of manufacturing an electric wire with a terminal to which an anticorrosive agent is applied. Patent Document 1 describes a crimping step of crimping a core wire to a wire connecting portion, and after the crimping step, a corrosion inhibitor is applied from above to the wire connecting portion in a state where the upper mold is removed and arranged in the crimping cavity. A coating process for coating and a method for manufacturing an electric wire with a terminal are disclosed.

JP-A-2017-204455

In electric wires with terminals, it is desired that the anticorrosion performance of the applied resin can be improved. For example, if it is possible to suppress the occurrence of unevenness when applying the resin, it is possible to improve the anticorrosion performance of the electric wire with terminals.

An object of the present invention is to provide an apparatus for manufacturing an electric wire with a terminal and a method for manufacturing the electric wire with a terminal, which can improve the anticorrosion performance of the electric wire with a terminal.

The device for manufacturing an electric wire with a terminal of the present invention includes a support base for supporting the electric wire with a terminal having the electric wire, a crimp terminal crimped to the electric wire from below, and a pumping unit for pumping a liquid resin. It has a concave surface that covers the terminal-equipped electric wire from above, and a passage that is open to the concave surface and discharges the resin sent from the pumping unit, and is driven by the driving unit to the support base. A moving body that moves relative to each other in the vertical direction is provided, and a film of the resin is formed on the concave surface by the resin discharged from the passage, and the film of the resin is attached to the core wire of the electric wire. To do.

The device for manufacturing an electric wire with a terminal according to the present invention includes a support base for supporting the electric wire with a terminal having the electric wire, a crimp terminal crimped to the electric wire from below, and a pumping unit for pumping a liquid resin. It has a concave surface that covers the electric wire with terminals from above, and a passage that opens in the concave surface and discharges the resin sent from the pumping unit. It is driven by the drive unit and is relative to the support base in the vertical direction. A moving body is provided, and a resin film is formed on a concave surface by a resin discharged from a passage, and the resin film is attached to the core wire of an electric wire. The apparatus for manufacturing an electric wire with a terminal according to the present invention has an effect of suppressing the occurrence of unevenness when applying a resin and improving the anticorrosion performance of the electric wire with a terminal.

FIG. 1 is a perspective view showing a crimp terminal and an electric wire before crimping according to the embodiment. FIG. 2 is a front view showing a crimp terminal and an electric wire before crimping according to the embodiment. FIG. 3 is a perspective view showing a crimp terminal and an electric wire after crimping according to the embodiment. FIG. 4 is a perspective view of the manufacturing apparatus according to the embodiment. FIG. 5 is a perspective view of the upper die and the discharge portion according to the embodiment. FIG. 6 is an exploded perspective view of the upper mold and the discharge portion according to the embodiment. FIG. 7 is an exploded perspective view of the discharge portion according to the embodiment. FIG. 8 is a perspective view of the second holding member according to the embodiment. FIG. 9 is a perspective view of the first holding member according to the embodiment. FIG. 10 is a cross-sectional view of the upper die and the discharge portion according to the embodiment. FIG. 11 is an enlarged cross-sectional view of the upper die and the discharge portion according to the embodiment. FIG. 12 is a cross-sectional view illustrating the resin coating process of the embodiment. FIG. 13 is a front view illustrating the resin coating process of the embodiment. FIG. 14 is a diagram illustrating the resin film of the embodiment. FIG. 15 is another front view illustrating the resin coating process of the embodiment. FIG. 16 is an enlarged cross-sectional view illustrating the resin coating process of the embodiment. FIG. 17 is a plan view of the electric wire with a terminal coated with the resin according to the embodiment. FIG. 18 is a cross-sectional view showing an example of a resin film formed on an electric wire with terminals.

Hereinafter, the apparatus for manufacturing the electric wire with terminals and the method for manufacturing the electric wire with terminals according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
An embodiment will be described with reference to FIGS. 1 to 18. The present embodiment relates to a terminal-equipped electric wire manufacturing apparatus and a terminal-equipped electric wire manufacturing method. FIG. 1 is a perspective view showing a crimp terminal and an electric wire before crimping according to an embodiment, FIG. 2 is a front view showing a crimp terminal and an electric wire before crimping according to an embodiment, and FIG. 3 is a front view showing a crimp terminal and an electric wire before crimping according to the embodiment. FIG. 4 is a perspective view of the manufacturing apparatus according to the embodiment, FIG. 5 is a perspective view of the upper mold and the discharge portion according to the embodiment, and FIG. 6 is a perspective view according to the embodiment. An exploded perspective view of the mold and the discharge portion, FIG. 7 is an exploded perspective view of the discharge portion according to the embodiment, FIG. 8 is a perspective view of the second holding member according to the embodiment, and FIG. 9 is a first perspective view according to the embodiment. A perspective view of the holding member, FIG. 10 is a cross-sectional view of the upper mold and the discharge portion according to the embodiment, FIG. 11 is an enlarged cross-sectional view of the upper mold and the discharge portion according to the embodiment, and FIG. 12 is a resin coating of the embodiment. A cross-sectional view illustrating the process, FIG. 13 is a front view explaining the resin coating process of the embodiment, FIG. 14 is a diagram explaining the resin film of the embodiment, and FIG. 15 is a diagram explaining the resin coating process of the embodiment. It is another front view.

As shown in FIG. 1, the crimp terminal 1 according to the present embodiment has a terminal connection portion 11, a core wire crimp portion 12, and a coating crimp portion 13. The terminal connection portion 11, the core wire crimping portion 12, and the covering crimping portion 13 are arranged in this order along the longitudinal direction of the crimping terminal 1. The crimp terminal 1 is formed of a conductive metal plate (for example, a copper plate or a copper alloy plate) as a base material. The crimp terminal 1 is formed into a predetermined shape by punching or bending the base material. The surface of the crimp terminal 1 may be plated with tin (Sn) or the like.

In the present specification, in the description of the crimp terminal 1, the connection direction with the mating terminal, that is, the insertion direction with the mating terminal is referred to as the first direction L. The first direction L is the longitudinal direction of the crimp terminal 1. The width direction of the crimp terminal 1 is referred to as a second direction W. The second direction W is orthogonal to the first direction L. In the crimp terminal 1, the direction orthogonal to both the first direction L and the second direction W is referred to as the third direction H. The third direction H is the compression direction by the upper die 50 when the crimp terminal 1 is crimped. The third direction H is the height direction of the crimp terminal 1.

The terminal connection portion 11 is a portion that is electrically connected to the other terminal. The shape of the terminal connection portion 11 of the present embodiment is a square cylinder shape. The core wire crimping portion 12 is a portion that is crimped to the core wire 61 of the electric wire 60. The electric wire 60 has a core wire 61 and a coating 62. The material of the core wire 61 is, for example, copper or aluminum. In the electric wire 60 to be crimped by the crimp terminal 1, the coating 62 at the end is removed and the core wire 61 is exposed to a predetermined length. The core wire 61 of the present embodiment is an aggregate of a plurality of strands. However, the core wire 61 may be a single wire such as a coaxial cable. The crimp terminal 1 is electrically connected to the exposed core wire 61 by being crimped to the end of the electric wire 60.

The shape of the core wire crimping portion 12 before being crimped to the core wire 61 is a U-shape as shown in FIG. The core wire crimping portion 12 has a bottom portion 21 and a first side wall portion 22. The bottom portion 21 is a bottom wall portion of the core wire crimping portion 12, and is supported by a lower mold 40 described later. The first side wall portion 22 has a first barrel piece portion 22A and a second barrel piece portion 22B. The first barrel piece 22A and the second barrel piece 22B are a pair of side wall portions that are crimped to the core wire 61. The first barrel piece portion 22A is a side wall portion protruding from one end in the width direction of the bottom portion 21. The second barrel piece portion 22B is a side wall portion protruding from the other end of the bottom portion 21 in the width direction. The first barrel piece 22A and the second barrel piece 22B extend in a direction intersecting the width direction of the bottom portion 21. The first barrel piece 22A and the second barrel piece 22B face each other in the second direction W. As shown in FIGS. 1 and 2, the distance between the first barrel piece 22A and the second barrel piece 22B increases from the bottom 21 side to the tip side.

As shown in FIG. 1, the covering crimping portion 13 has a bottom portion 31 and a second side wall portion 32. The shape of the coating crimping portion 13 before being crimped to the coating 62 is a U-shape as shown in FIG. The bottom portion 31 is a bottom wall portion of the covering crimping portion 13. The second side wall portion 32 has a third barrel piece portion 32A and a fourth barrel piece portion 32B. The third barrel piece portion 32A is a side wall portion protruding from one end in the width direction of the bottom portion 31. The fourth barrel piece portion 32B is a side wall portion protruding from the other end in the width direction of the bottom portion 31. The third barrel piece 32A and the fourth barrel piece 32B face each other in the second direction W. The distance between the third barrel piece 32A and the fourth barrel piece 32B increases from the bottom 31 side toward the tip side. The coating crimping portion 13 is crimped to the coating 62 by the lower mold 40 and the upper mold 50.

The terminal connection portion 11 and the core wire crimping portion 12 are connected via an intermediate portion 14. The height of the intermediate portion 14 is lower than either the height of the terminal connecting portion 11 or the height of the core wire crimping portion 12. The core wire crimping portion 12 and the covering crimping portion 13 are connected via an intermediate portion 15. The intermediate portion 15 has a bottom portion 15a and a side wall portion 15b. The bottom portion 15a connects the bottom portion 21 of the core wire crimping portion 12 and the bottom portion 31 of the covering crimping portion 13. The side wall portion 15b extends from both sides of the bottom portion 15a. One side wall portion 15b connects the first barrel piece portion 22A and the third barrel piece portion 32A. The other side wall portion 15b connects the second barrel piece portion 22B and the fourth barrel piece portion 32B. The height of the side wall portion 15b is lower than any of the heights of the barrel piece portions 22A and 22B of the core wire crimping portion 12 and the heights of the barrel piece portions 32A and 32B of the covering crimping portion 13.

As shown in FIG. 1, the electric wire 60 is placed on the crimp terminal 1 so that the axial direction of the electric wire 60 coincides with the longitudinal direction of the crimp terminal 1. The tip portion 61a of the core wire 61 is directed to the terminal connection portion 11 in a state of being placed on the crimp terminal 1. The core wire 61 exposed to the outside from the coating 62 is placed on the core wire crimping portion 12. At this time, the tip portion 61a of the core wire 61 may protrude from the core wire crimping portion 12 toward the terminal connection portion 11. The coating 62 of the electric wire 60 is placed on the coating crimping portion 13. The electric wire 60 may be installed so that the tip 62a of the coating 62 is located between the core wire crimping portion 12 and the coating crimping portion 13.

The core wire crimping portion 12 and the covering crimping portion 13 are crimped to the electric wire 60 by the lower die 40 and the upper die 50 shown in FIG. The lower die 40 is a die on the support side that supports the core wire crimping portion 12 and the covering crimping portion 13 from below. The support surface 40a of the lower mold 40 supports the outer surface of the bottom portion 21 of the core wire crimping portion 12. Therefore, in a state where the core wire crimping portion 12 is supported by the lower mold 40, the first barrel piece portion 22A and the second barrel piece portion 22B are in a posture of extending diagonally upward from the bottom portion 21. The lower mold 40 similarly supports the covering crimping portion 13 from below.

The terminal-equipped electric wire manufacturing apparatus (hereinafter, simply referred to as “manufacturing apparatus”) 100 according to the present embodiment is configured to perform both a crimping step and a resin coating step as described below. The manufacturing apparatus 100 of the present embodiment can improve the anticorrosion performance of the electric wire 5 with terminals.

As shown in FIG. 4, the manufacturing apparatus 100 includes a frame 111, a ram 114, a pressing member 122, an upper mold 50, a coating mechanism 3, and the like. The manufacturing apparatus 100 further has a lower mold 40 shown in FIG. 2 and the like. The frame 111 is fixed to, for example, a mounting table on which the manufacturing apparatus 100 is mounted. The ram 114 is a member that moves relative to the frame 111 in the vertical direction. The manufacturing apparatus 100 has a drive unit 110 (see FIG. 12) that reciprocates the ram 114 in the vertical direction. The pressing member 122 is fixed to the ram 114 and moves up and down together with the ram 114. The pressing member 122 operates a cutting mechanism that separates the crimp terminal 1.

The coating mechanism 3 includes a pumping unit 4, a holder 5, a tube 6, a first discharging unit 7, and a second discharging unit 8. The pumping unit 4 is a mechanism for pumping a liquid resin, and includes, for example, a pump. The pumping unit 4 may have a mechanism for adjusting the discharge pressure and the discharge amount of the resin. The first discharge unit 7 and the second discharge unit 8 are members that discharge resin to the core wire 61 of the electric wire 60. The holder 5 is a member that holds the first discharge portion 7 and the second discharge portion 8.

As shown in FIG. 5, the pressing member 122 has a main body 123 and a pair of holding wall portions 124. The shape of the main body 123 is a substantially rectangular plate shape. The front surface 123a of the main body 123 faces the upper mold 50. The pair of holding wall portions 124 project from the back surface 123b of the main body 123 toward the side opposite to the upper mold 50. The pair of holding wall portions 124 face each other and hold the holder 5. One holding wall portion 124 has a guide protrusion 124a for positioning the holder 5. The holder 5 is inserted between the pair of holding wall portions 124 and fixed to the pressing member 122. Therefore, the holder 5 is fixed to the ram 114 and moves up and down together with the ram 114.

As shown in FIG. 6, the upper die 50 of the present embodiment has a first crimping member 51, a second crimping member 52, a first holding member 53, and a second holding member 54. The first crimping member 51, the second crimping member 52, the first holding member 53, and the second holding member 54 are plate-shaped members, respectively, and are made of, for example, metal. The four members 51, 52, 53, 54 are stacked in the order of the second crimping member 52, the second holding member 54, the first crimping member 51, and the first holding member 53 from the pressing member 122 side.

The first crimping member 51 is a member that crimps the first side wall portion 22 of the crimp terminal 1 with respect to the core wire 61. The second crimping member 52 is a member that crimps the second side wall portion 32 of the crimp terminal 1 to the coating 62. The first holding member 53 is a member that holds the first tubular portion 73 of the first discharge portion 7. The second holding member 54 is a member that holds the second tubular portion 83 of the second discharge portion 8.

As shown in FIG. 7, the first discharge portion 7 has a main body portion 71, a fitting portion 72, and a first tubular portion 73. The main body 71 is a tubular component and has an inlet side opening 74 at one end in the axial direction. The first tubular portion 73 projects from the other end of the main body portion 71 in the axial direction. The first tubular portion 73 is an elongated tubular constituent portion. The internal space of the first tubular portion 73 communicates with the internal space of the main body portion 71. A tube 6 is connected to the inlet side opening 74. The resin sent out from the pumping section 4 flows into the first tubular section 73 from the tube 6 via the main body section 71.

The first tubular portion 73 is bent at the intermediate portion. More specifically, the first tubular portion 73 has a proximal end side tubular portion 75, a bent portion 76, and a distal end side tubular portion 77. The base end side cylinder portion 75 and the tip end side cylinder portion 77 are linear portions, respectively. The base end side tubular portion 75 is connected to the main body portion 71 and extends along the axial direction of the main body portion 71. The distal end side tubular portion 77 extends in a direction orthogonal to the proximal end side tubular portion 75. The bent portion 76 connects the proximal end side tubular portion 75 and the distal end side tubular portion 77, and is curved in an arc shape. The fitting portion 72 projects from the outer surface of the main body portion 71. The outer shape of the fitting portion 72 when viewed in the axial direction is substantially rectangular. The fitting portion 72 fits into the first storage chamber 5a of the holder 5.

The second discharge portion 8 has a main body portion 81, a fitting portion 82, and a second tubular portion 83. The main body 81 is a tubular component and has an inlet side opening 84 at one end in the axial direction. The second tubular portion 83 projects from the other end of the main body portion 81 in the axial direction. The second tubular portion 83 is an elongated tubular constituent portion. The internal space of the second tubular portion 83 communicates with the internal space of the main body portion 81. A tube 6 is connected to the inlet side opening 84. The resin sent out from the pumping section 4 flows into the second tubular section 83 from the tube 6 via the main body section 81.

The second tubular portion 83 is bent at the intermediate portion. More specifically, the second tubular portion 83 has a proximal end side tubular portion 85, a bent portion 86, and a distal end side tubular portion 87. The base end side cylinder portion 85 and the tip end side cylinder portion 87 are linear portions, respectively. The base end side tubular portion 85 is connected to the main body portion 81 and extends along the axial direction of the main body portion 81. The distal end side tubular portion 87 extends in a direction orthogonal to the proximal end side tubular portion 85. The bent portion 86 connects the proximal end side tubular portion 85 and the distal end side tubular portion 87, and is curved in an arc shape. The fitting portion 82 projects from the outer surface of the main body portion 81. The outer shape of the fitting portion 82 when viewed in the axial direction is substantially rectangular. The fitting portion 82 fits into the second storage chamber 5b of the holder 5.

The holder 5 has a first storage chamber 5a, a second storage chamber 5b, a first slit 5c, and a second slit 5d. The first storage chamber 5a has an opening 5g on the back surface 5f of the holder 5. The first storage chamber 5a is recessed from the opening 5g toward the front surface 5e. The cross-sectional shape of the first storage chamber 5a is substantially rectangular. The second storage chamber 5b has an opening 5h on the back surface 5f of the holder 5. The second storage chamber 5b is recessed from the opening 5h toward the front surface 5e. The opening 5g and the opening 5h are aligned in the third direction H.

The first slit 5c communicates the first storage chamber 5a with the external space. The first slit 5c is connected to the opening 5g and is continuously formed from the side surface 5k of the holder 5 to the front surface 5e. The second slit 5d communicates the second storage chamber 5b with the external space. The second slit 5d is connected to the opening 5h and is continuously formed from the side surface 5k of the holder 5 to the front surface 5e.

When the first discharge portion 7 is attached to the holder 5, the first tubular portion 73 is passed through the first slit 5c, and the main body portion 71 is inserted into the first storage chamber 5a. At this time, the main body 71 is positioned by fitting the fitting portion 72 with the first storage chamber 5a. When the second discharge portion 8 is attached to the holder 5, the second tubular portion 83 is passed through the second slit 5d, and the main body portion 81 is inserted into the second storage chamber 5b. At this time, the main body 81 is positioned by fitting the fitting portion 82 with the second storage chamber 5b.

As shown in FIG. 6, a through hole 125 is formed in the main body 123 of the pressing member 122. The through hole 125 is arranged between the pair of holding wall portions 124. The shape of the through hole 125 is a shape that allows the first tubular portion 73 and the second tubular portion 83 to pass through. The through hole 125 is an elongated hole along the third direction H.

The second crimping member 52 has a through hole 52a that penetrates the second crimping member 52 in the plate thickness direction. The shape of the through hole 52a is a shape that allows the first tubular portion 73 and the second tubular portion 83 to pass through. The through hole 52a is an elongated hole along the third direction H. The second crimping member 52 has a second crimping surface 52b. The second crimping surface 52b is a surface for crimping the second side wall portion 32 with respect to the coating 62. The second crimping surface 52b is a concave surface formed at one end of the second crimping member 52 in the longitudinal direction. The second crimping member 52 is fixed to the ram 114 with the second crimping surface 52b facing downward. The second crimping surface 52b and the through hole 52a are arranged adjacent to each other on the same straight line.

The second holding member 54 has a through hole 54a that penetrates the second holding member 54 in the plate thickness direction. The shape of the through hole 54a is a shape that allows the first tubular portion 73 to pass through and a shape that allows the second tubular portion 83 to enter. The second holding member 54 has a concave surface 54b. The concave surface 54b is arranged at a position corresponding to the second crimping surface 52b. The second holding member 54 is fixed to the ram 114 in a posture in which the concave surface 54b faces downward.

As shown in FIGS. 6 and 8, a fitting projection 54d is provided on the back surface 54c of the second holding member 54. The fitting projection 54d is fitted into the through hole 52a of the second crimping member 52 to position the second holding member 54 with respect to the second crimping member 52. Further, as shown in FIG. 8, a fitting projection 54f is provided on the front surface 54e of the second holding member 54. The fitting projection 54f is fitted into the through hole 51c of the first crimping member 51 to position the second holding member 54 with respect to the first crimping member 51.

As shown in FIG. 8, the second holding member 54 has a holding hole 54 g. The holding hole 54g extends along the longitudinal direction of the second holding member 54. One end of the holding hole 54g is open to the concave surface 54b. The other end of the holding hole 54g communicates with the through hole 54a. The tip end side tubular portion 87 of the second tubular portion 83 is inserted into the holding hole 54 g.

As shown in FIG. 6, the first crimping member 51 has through holes 51a and 51c that penetrate the first crimping member 51 in the plate thickness direction. The shape of the through hole 51a is a shape that allows the first tubular portion 73 to pass through. The shape of the through hole 51c corresponds to the shape of the fitting projection 54f of the second holding member 54. The first crimping member 51 has a first crimping surface 51b. The first crimping surface 51b is a concave surface for crimping the first side wall portion 22 of the crimp terminal 1 with respect to the core wire 61. One first crimping surface 51b is formed at both ends of the first crimping member 51 in the longitudinal direction. The through hole 51c is arranged between the through hole 51a and the first crimping surface 51b. The first crimping surface 51b, the through hole 51c, and the through hole 51a are arranged on the same straight line. The first crimping member 51 is fixed to the ram 114 with any one of the first crimping surfaces 51b facing downward.

As shown in FIGS. 6 and 9, the first holding member 53 has a through hole 53a that penetrates the first holding member 53 in the plate thickness direction. The shape of the through hole 53a is such that the first tubular portion 73 can enter. As shown in FIG. 9, the first holding member 53 has a holding hole 53c. The holding hole 53c extends along the longitudinal direction of the first holding member 53. One end of the holding hole 53c is open to the end surface 53d of the first holding member 53. The other end of the holding hole 53c communicates with the through hole 53a. The holding hole 53c of the present embodiment is arranged at a position closer to the back surface 53b in the plate thickness direction of the first holding member 53. The back surface 53b is a surface facing the first crimping member 51. The distal end side tubular portion 77 of the first tubular portion 73 is inserted into the holding hole 53c. The tip of the tip-side tubular portion 77 projects from the holding hole 53c.

The first discharge unit 7 and the second discharge unit 8 are assembled to the upper mold 50 as shown in FIGS. 10 and 11. The first tubular portion 73 of the first discharge portion 7 penetrates the pressing member 122, the second crimping member 52, the second holding member 54, and the first crimping member 51. More specifically, the base end side tubular portion 75 and the bent portion 86 of the first tubular portion 73 penetrate the pressing member 122, the second crimping member 52, and the second holding member 54 along the first direction L. There is. The distal end side tubular portion 77 of the first tubular portion 73 is inserted into the holding hole 53c of the first holding member 53.

The first discharge unit 7 has a passage 78. The passage 78 is a passage through which the resin injected into the main body 71 is passed toward the core wire 61. The passage 78 of the present embodiment is formed in the first tubular portion 73 and penetrates the first tubular portion 73. One end of the passage 78 communicates with the internal space of the main body 71. The other end of the passage 78 is open to the external space at the discharge port 79. The discharge port 79 is formed at the tip of the tip side tubular portion 77. At least a part of the passage 78 may be a hole formed in the upper mold 50. That is, the passage 78 may be configured so that the resin sent out from the pumping unit 4 can be discharged toward the core wire 61.

The second tubular portion 83 of the second discharge portion 8 penetrates the pressing member 122 and the second crimping member 52. More specifically, the base end side tubular portion 85 and the bent portion 86 of the second tubular portion 83 penetrate the pressing member 122 and the second crimping member 52 along the first direction L. The distal end side tubular portion 87 of the second tubular portion 83 is inserted into the holding hole 54 g of the second holding member 54.

The second discharge unit 8 has a passage 88. The passage 88 is a passage through which the resin injected into the main body 81 is passed toward the core wire 61. The passage 88 of the present embodiment is formed in the second tubular portion 83 and penetrates the second tubular portion 83. One end of the passage 88 communicates with the internal space of the main body 81. The other end of the passage 88 is open to the external space at the discharge port 89. The discharge port 89 is formed at the tip of the tip side tubular portion 87. At least a part of the passage 88 may be a hole formed in the upper mold 50. That is, the passage 88 may be configured so that the resin sent out from the pumping unit 4 can be discharged toward the core wire 61.

As shown in FIG. 11, the tip of the first tubular portion 73 protrudes from the holding hole 53c. That is, the discharge port 79 of the first tubular portion 73 is located below the end surface 53d of the first holding member 53. In the cross-sectional view of FIG. 11, the discharge port 79 is located above the first crimping surface 51b of the first crimping member 51. The discharge port 79 is arranged at a position adjacent to the front surface 51d of the first crimping member 51.

The tip of the second tubular portion 83 is located inside the holding hole 54 g. That is, the discharge port 89 of the second tubular portion 83 is located above the opening 54h of the holding hole 54g. The position of the discharge port 89 is slightly above the opening 54h. In the cross-sectional view of FIG. 11, the opening 54h is located above any of the first crimping surface 51b and the second crimping surface 52b. That is, the opening 54h is located between the back surface 51e of the first crimping member 51 and the front surface 52c of the second crimping member 52. Therefore, the discharge port 89 of the second discharge unit 8 discharges the resin toward the space 54k surrounded by the back surface 51e, the front surface 52c, and the concave surface 54b. In other words, the holding hole 54g discharges the resin from the opening 54h toward the space 54k.

Since the manufacturing apparatus 100 of the present embodiment has the above configuration, the crimping step and the resin coating step can be performed by one apparatus. Further, as described below, the manufacturing apparatus 100 can continuously execute the crimping step and the resin coating step without moving the crimping terminal 1.

Before the crimping process is started, the crimping terminal 1 is placed on the lower mold 40 as shown in FIG. Further, the electric wire 60 is placed on the crimp terminal 1. In the crimping step, as shown in FIG. 12, the drive unit 110 of the manufacturing apparatus 100 lowers the upper die 50 toward the lower die 40. The manufacturing apparatus 100 has a control device for controlling the drive unit 110 and the coating mechanism 3. The relative movement of the upper mold 50 with respect to the lower mold 40 and the discharge operation of the resin 9 by the discharge units 7 and 8 are controlled by the control device.

When the upper die 50 is lowered, the first crimping surface 51b of the upper die 50 crimps the first side wall portion 22 to the core wire 61 of the electric wire 60. The second crimping surface 52b of the upper die 50 crimps the second side wall portion 32 to the coating 62 of the electric wire 60. As a result, as shown in FIG. 3, the crimp terminal 1 is crimped to the electric wire 60.

In the electric wire 2 with terminals of the present embodiment, the tip portion 61a and the intermediate exposed portion 61b of the core wire 61 are exposed to the external space, respectively. The tip portion 61a protrudes from the first side wall portion 22 after crimping toward the terminal connection portion 11 along the first direction L. The intermediate exposed portion 61b is a portion exposed to the external space between the first side wall portion 22 after crimping and the second side wall portion 32 after crimping.

In the manufacturing apparatus 100 of the present embodiment, as shown in FIG. 12, the first discharge portion 7 discharges the resin 9 to the tip portion 61a of the core wire 61. Further, the second discharge portion 8 discharges the resin 9 to the intermediate exposed portion 61b of the core wire 61. The resin 9 is a liquid resin, for example, an ultraviolet curable resin. The resin 9 may be a thermosetting resin, a two-component mixed type curable resin, or the like.

The first discharge unit 7 and the second discharge unit 8 apply the resin 9 to the core wire 61 in the resin coating step. The resin coating step may be executed after the crimping step is completed, or may be executed in parallel with the crimping step. When the resin coating step is executed after the crimping step is completed, for example, as shown in FIG. 12, the manufacturing apparatus 100 has the first discharge unit 7 and the second discharge with the upper mold 50 stopped at the bottom dead center. The resin 9 is discharged by the unit 8. That is, the manufacturing apparatus 100 can continuously execute the crimping process and the resin coating process.

FIG. 12 shows a state in which the upper die 50 is located at the bottom dead center. When the upper die 50 descends to the bottom dead center, the crimping of the crimp terminal 1 to the electric wire 60 is completed. The control device stops the upper die 50 at the bottom dead center, and discharges the resin 9 from the first discharge unit 7 and the second discharge unit 8. The resin 9 discharged from the first discharge portion 7 adheres to the tip portion 61a of the core wire 61 and integrally covers the tip portion 61a and the crimp terminal 1. The resin 9 discharged from the second discharge portion 8 adheres to the intermediate exposed portion 61b of the core wire 61 and integrally covers the intermediate exposed portion 61b and the crimp terminal 1.

Here, in the manufacturing apparatus 100 of the present embodiment, as described below, the resin 9 discharged from the second discharge unit 8 forms a film of the resin 9 on the concave surface 54b, and the film of the resin 9 is formed on the electric wire 60. It is attached to the core wire 61. By adhering the film of the resin 9 to the core wire 61, it is possible to uniformly apply the resin 9 without gaps or unevenness.

As shown in FIG. 13, in the resin coating step, the resin 9 sent by the second discharge unit 8 is discharged from the opening 54h of the second holding member 54. As shown by the arrow Y1, the resin 9 discharged from the opening 54h spreads along the concave surface 54b due to surface tension. The concave surface 54b of the present embodiment has a first facing portion 54m and a second facing portion 54n. The first facing portion 54m is a portion facing the lower mold 40 in the vertical direction. The first facing portion 54m is, for example, a substantially horizontal surface. The second facing portion 54n extends downward from the end of the first facing portion 54m. The second facing portion 54n is a portion facing the electric wire 2 with a terminal in the horizontal direction. The second facing portion 54n extends in the vertical direction, for example. A curved portion 54p is provided between the first facing portion 54m and the second facing portion 54n.

As shown in FIG. 14, the resin 9 discharged from the opening 54h travels along the concave surface 54b to form the resin film 90. The liquid level of the resin 9 is maintained by the surface tension, and the resin 9 aggregates to form the resin film 90. As the resin 9 continues to be discharged from the opening 54h, the thickness of the resin film 90 increases, and the film surface 91 of the resin film 90 descends. The resin film 90 is formed on at least the first facing portion 54m and covers the first facing portion 54m. The resin film 90 may be formed so as to cover the curved portion 54p, or may be formed so as to cover the second facing portion 54n.

As the film surface 91 of the resin film 90 descends as shown in FIG. 15, the film surface 91 adheres to the core wire 61. When the film surface 91 comes into contact with the core wire 61, the contact region of the resin film 90 with respect to the core wire 61 expands due to surface tension. The contact region of the resin film 90 with respect to the core wire 61 extends along the first direction L and the second direction W. As a result, the resin film 90 covers the entire surface of the intermediate exposed portion 61b, and integrally covers the intermediate exposed portion 61b and the crimp terminal 1.

In the manufacturing apparatus 100 of the present embodiment, the resin film 90 is formed so as to cover the upper part of the first facing portion 54m, the curved portion 54p, and the second facing portion 54n. In other words, the resin film 90 is formed so as to fill the gap between the electric wire 2 with terminals and the concave surface 54b. By filling the gap between the electric wire 2 with terminals and the concave surface 54b with the resin 9, the resin 9 can be easily and evenly and uniformly applied to the intermediate exposed portion 61b.

Further, in the resin coating step of the present embodiment, the resin 9 is also coated on the end face 15c of the intermediate portion 15. The end surface 15c is a cut surface when the crimp terminal 1 is formed from the base material, and is not plated. By applying the resin 9 to the end face 15c, the anticorrosion performance of the electric wire 2 with terminals is improved.

The manufacturing apparatus 100 of the present embodiment can appropriately apply the resin 9 to the inclined core wire 61 as described below with reference to FIG. As shown in FIG. 16, the intermediate exposed portion 61b of the present embodiment is inclined with respect to the first direction L. More specifically, the upper surface of the intermediate exposed portion 61b is inclined downward as it approaches the first side wall portion 22 from the second side wall portion 32.

When the intermediate exposed portion 61b is inclined in this way, it is considered that the position where the resin film 90 starts to come into contact with the intermediate exposed portion 61b is the top portion 61c of the intermediate exposed portion 61b. The top portion 61c is an end portion on the second side wall portion 32 side of the upper surface of the intermediate exposed portion 61b. When the resin film 90 comes into contact with the top portion 61c, the contact area between the resin film 90 and the intermediate exposed portion 61b expands as shown by the arrow Y2. The contact area expands toward the first side wall portion 22 due to surface tension and gravity. Therefore, the manufacturing apparatus 100 of the present embodiment can quickly apply the resin 9 to the entire surface of the intermediate exposed portion 61b.

The opening 54h may be arranged at a position closer to the second crimping member 52 so that the resin film 90 can be brought into contact with the top 61c more reliably. Further, the size of the holding hole 54g and the like are appropriately determined so that the resin 9 discharged from the opening 54h can form the resin film 90 without dropping.

By executing the resin coating step, the resin film 92 and the resin film 93 are formed on the electric wire 2 with terminals as shown in FIG. The resin film 92 applied by the first discharge portion 7 covers the tip portion 61a of the core wire 61. The resin film 93 applied by the second discharge portion 8 covers the intermediate exposed portion 61b. The manufacturing apparatus 100 raises the upper mold 50 when the resin coating process is completed. When the resin coating step is completed, the curing step is executed. The curing step is a step of curing the applied resin 9. When the resin 9 is an ultraviolet curable resin, ultraviolet rays are applied to the resin films 92 and 93 in the curing step. The cured resin 9 shields the core wire 61 from the external space and protects the electrical connection portion between the core wire 61 and the crimp terminal 1. The resin 9 regulates, for example, the infiltration of moisture into the connection portion between the core wire 61 and the crimp terminal 1. Therefore, the electric wire 2 with a terminal of the present embodiment can suitably suppress the occurrence of corrosion when the material of the core wire 61 and the material of the crimp terminal 1 are different metals.

As described above, the manufacturing apparatus 100 of the present embodiment includes a lower mold 40, a pumping unit 4, and an upper mold 50. The lower mold 40 is a support base that supports the electric wire 2 with terminals from below. In the crimping step, the crimp terminal 1 is crimped to the electric wire 60 to form the electric wire 2 with a terminal. The lower mold 40 functions as a support base for supporting the electric wire 2 with terminals from below in the resin coating process. The pumping unit 4 is a mechanism for pumping the liquid resin 9.

The upper mold 50 is a moving body having a concave surface 54b and a holding hole 54g, and is driven by a driving unit 110 to move relative to the lower mold 40 in the vertical direction. The concave surface 54b of the upper die 50 is a surface that covers the electric wire 2 with terminals from above. The holding hole 54g is an opening in the concave surface 54b, and is a passage for discharging the resin 9 sent from the pumping unit 4.

In the manufacturing apparatus 100 of the present embodiment, the resin film 90 is formed on the concave surface 54b by the resin 9 discharged from the holding hole 54g, and the resin film 90 is attached to the core wire 61 of the electric wire 60. By adhering the resin film 90 to the core wire 61, the manufacturing apparatus 100 of the present embodiment can suppress the occurrence of unevenness when the resin 9 is applied, and can improve the anticorrosion performance of the electric wire 2 with terminals. In the manufacturing apparatus 100 of the present embodiment, the resin 9 can be applied at once so as to wrap the core wire 61 and the crimp terminal 1 in a state where the resin 9 is aggregated. Further, the manufacturing apparatus 100 of the present embodiment can apply the resin 9 while suppressing the generation of air bubbles. For example, as compared with the method of flying the droplets of the resin 9 toward the core wire 61, bubbles are less likely to be generated in the formed resin film 93.

The concave surface 54b of the present embodiment has a first facing portion 54m and a second facing portion 54n. The first facing portion 54m is a portion facing the lower mold 40 in the vertical direction. The second facing portion 54n extends downward from the end of the first facing portion 54m, and is a portion facing the electric wire 2 with a terminal in the horizontal direction. The resin film 90 is formed at least on the first facing portion 54 m. By forming the resin film 90 at least on the first facing portion 54 m, the film surface 91 of the resin film 90 faces the core wire 61 of the electric wire 60 in the vertical direction. Therefore, when the resin film 90 comes into contact with the core wire 61, the resin 9 is applied to the entire surface of the core wire 61 in a short time.

The upper die 50 of the present embodiment has a first crimping surface 51b and a second crimping surface 52b. The first crimping surface 51b is a surface for crimping the first side wall portion 22 of the crimp terminal 1 with respect to the core wire 61. The second crimping surface 52b is a surface for crimping the second side wall portion 32 with respect to the coating 62. The second side wall portion 32 is one of the pair of side wall portions 22 and 32 included in the crimp terminal 1, and is separated from the first side wall portion 22 in the axial direction of the electric wire 60. The upper mold 50 attaches the resin film 90 to the intermediate exposed portion 61b. The intermediate exposed portion 61b is a portion of the core wire 61 that is exposed to the external space between the first side wall portion 22 and the second side wall portion 32. In the manufacturing apparatus 100 of the present embodiment, the resin 9 can be applied to the electric wire 2 with terminals so as to integrally cover the intermediate exposed portion 61b, the first side wall portion 22, and the second side wall portion 32.

In the manufacturing apparatus 100 of the present embodiment, the lower mold 40 corresponds to a support base and the upper mold 50 corresponds to a moving body. The manufacturing apparatus 100 continuously executes the crimping step and the resin coating step. Therefore, the manufacturing apparatus 100 of the present embodiment can improve the production efficiency of the electric wire 2 with terminals.

The method for manufacturing an electric wire with a terminal according to the present embodiment includes a covering step and a resin coating step. The covering step is a step of covering the electric wire 2 with a terminal from above with the concave surface 54b of the upper die 50. In the present embodiment, the terminal-attached electric wire 2 is formed by the crimping process, so that the concave surface 54b covers the terminal-attached electric wire 2 from above. The resin coating step is a step of discharging the liquid resin 9 from the holding hole 54g opened in the concave surface 54b to form the resin film 90 on the concave surface 54b and attaching the resin film 90 to the core wire 61 of the electric wire 60. is there. The method for manufacturing a terminal-attached electric wire according to the present embodiment can improve the anticorrosion performance of the terminal-attached electric wire 2.

[First Modified Example of Embodiment]
As shown in FIG. 18, the manufacturing apparatus 100 may apply the resin 9 so as to cover the side surface of the electric wire 2 with terminals. FIG. 18 is a cross-sectional view of an electric wire with a terminal according to the first modification of the embodiment. FIG. 18 shows a cross section corresponding to the XVIII-XVIII cross section position of FIG. FIG. 18 shows a resin film 93 that covers the intermediate exposed portion 61b. The resin film 93 integrally covers the intermediate exposed portion 61b, the end surface 15c of the intermediate portion, and the side surface 15d. By forming the resin film 93 on the side surface 15d of the intermediate portion 15, the anticorrosion performance of the electric wire 2 with terminals is improved. When the resin 9 is applied to the side surface 15d, it is preferable to form the second holding member 54 so that an appropriate gap is generated between the second facing portion 54n of the concave surface 54b and the side surface 15d. By separating the second facing portion 54n from the side surface 15d, the resin 9 enters the gap, and a film of the resin 9 is formed on the side surface 15d.

The manufacturing apparatus 100 may apply the resin 9 to the side surface 15d with respect to a part of the section in the intermediate portion 15. As shown in FIG. 17, the width of the intermediate portion 15 of the present embodiment changes along the first direction L. The manufacturing apparatus 100 may be configured so that the resin 9 is applied to the side surface 15d of the narrow portion 15e of the intermediate portion 15 and the resin 9 is not applied to the side surface 15d of the wide portion 15f.

In the manufacturing apparatus 100 according to the first modification of the embodiment, the resin film 90 is formed on the concave surface 54b by the resin 9 discharged from the holding hole 54 g, and the resin film 90 is crimped to the core wire 61, the end surface 15c of the crimp terminal 1, and the crimp terminal 1. It is attached to the side surface 15d of the terminal 1. As a result, a resin film 93 that integrally covers the core wire 61, the end surface 15c, and the side surface 15d is formed on the electric wire 2 with terminals. In other words, the electric wire 2 with a terminal manufactured by the manufacturing apparatus 100 of the present modification has an electric wire 60 and a crimp terminal 1 crimped to the core wire 61 and the coating 62 of the electric wire 60. The terminald electric wire 2 has a continuous resin film 93 that covers the core wire 61, the end surface 15c, and the side surface 15d. Therefore, the electric wire 2 with terminals has high anticorrosion performance.

[Second variant of the embodiment]
A second modification of the embodiment will be described. When the resin coating step is executed in parallel with the crimping step, the manufacturing apparatus 100 may discharge the resin 9 by the discharge units 7 and 8 in the crimping step. In this case, the manufacturing apparatus 100 starts the discharge operation by the discharge units 7 and 8 while lowering the upper mold 50. When the upper die 50 reaches the bottom dead center or when the upper die 50 descends to the vicinity of the bottom dead center, the resin film 90 adheres to the core wire 61 and covers the core wire 61.

The crimp terminal 1 may cover both the core wire 61 and the coating 62 with a set of side wall portions. In this case, in the core wire 61, the intermediate exposed portion 61b is not generated, and the tip portion 61a is exposed. Therefore, the manufacturing apparatus 100 may attach the resin film 90 to the tip portion 61a by the second discharge portion 8.

In the upper mold 50, the first crimping member 51 and the first holding member 53 may be integrated. In the upper mold 50, the second crimping member 52 and the second holding member 54 may be integrated. In addition, any member 51, 52, 53, 54 may be integrated.

In the coating mechanism 3, the system for pressure-feeding the resin 9 to the first discharge unit 7 and the system for pressure-feeding the resin 9 to the second discharge unit 8 may be different systems. For example, the coating mechanism 3 may make the timing at which the resin 9 starts to be discharged from the first discharge unit 7 different from the timing at which the resin 9 starts to be discharged from the second discharge unit 8. The coating mechanism 3 may make the length of the period during which the resin 9 is discharged from the first discharge unit 7 different from the length of the period during which the resin 9 is discharged from the second discharge unit 8.

[Third variant of the embodiment]
A third modification of the embodiment will be described. In the above embodiment, both the crimping step and the resin coating step are executed by the manufacturing apparatus 100, but the crimping step may be performed by an apparatus different from the manufacturing apparatus 100. That is, the manufacturing apparatus 100 may be an apparatus for applying the resin 9 to the electric wire 2 with terminals formed by another apparatus.

The contents disclosed in the above-described embodiments and modifications can be combined and executed as appropriate.

1 Crimping terminal 2 Electric wire with terminal 3 Coating mechanism 4 Pumping part 5 Holder 5a: 1st storage chamber, 5b: 2nd storage chamber 5b, 5c: 1st slit, 5d: 2nd slit, 5e: Front, 5f: Back, 5g: Opening, 5h: Opening 6 Tube 7 1st discharge part 8 2nd discharge part 9 Resin 11 Terminal connection part 12 Core wire crimping part 13 Coated crimping part 14, 15 Intermediate part 15a: Bottom part, 15b: Side wall part, 15c: End face , 15d: Side surface, 15e: Narrow part, 15f: Wide part 21, 31 Bottom 22 First side wall 22A: First barrel piece, 22B: Second barrel piece 32 Second side wall 32A: No. Three barrel piece, 32B: Fourth barrel piece 40 Lower type 40a Support surface 50 Upper type 50a Crimping part 51 First crimping member 51a: Through hole, 51b: First crimping surface, 51c: Fitting hole, 51d: Front, 51e: Back 52 Second crimping member 52a: Through hole, 52b: Second crimping surface, 52c: Front 53 First holding member 53a: Through hole, 53b: Back, 53c: Holding hole, 53d: End face 54 Second holding member 54a: Through hole, 54b concave surface, 54c: Back surface, 54d: Fitting protrusion, 54e: Front surface, 54f: Fitting protrusion, 54g: Holding hole, 54h: Opening, 54k: Space, 54m : First facing part, 54n: Second facing part, 54p: Curved part 60 Electric wire 61 Core wire 61a: Tip part, 61b: Intermediate exposed part, 61c: Top 62 Cover 62a Tip 71: Main body part, 72: Fitting part, 73: First tubular part, 74: Entrance side opening, 75: Base end side tubular part, 76: Bending part, 77: Tip side tubular part, 78: Passage, 79: Discharge port 81: Main body part, 82: Fitting Joint part, 83: Second tubular part, 84: Inlet side opening, 85: Base end side tubular part, 86: Bending part, 87: Tip side tubular part, 88: Passage, 89: Discharge port 90 Resin film 91 film Surface 100 Manufacturing equipment 110: Drive unit, 111: Frame, 114: Ram, 122: Pushing member, 123: Main body, 124: Holding wall part, 124a: Guide protrusion, 125: Through hole L First direction W Second direction H Third direction

Claims (5)

A support base for supporting an electric wire with a terminal having an electric wire and a crimp terminal crimped to the electric wire from below.
A pumping unit that pumps liquid resin and
It has a concave surface that covers the electric wire with terminals from above, and a passage that is open to the concave surface and discharges the resin sent from the pumping unit, and is driven by the driving unit to the support base. With a moving body that moves relative to the vertical direction
With
An apparatus for manufacturing an electric wire with a terminal, characterized in that a film of the resin is formed on the concave surface by the resin discharged from the passage, and the film of the resin is attached to the core wire of the electric wire. The concave surface extends downward from a first facing portion facing the support base in the vertical direction and an end portion of the first facing portion, and faces the electric wire with a terminal in the horizontal direction. With two facing parts,
The apparatus for manufacturing an electric wire with a terminal according to claim 1, wherein the resin film is formed at least on the first facing portion. The moving body has a first crimping surface and a second crimping surface.
The first crimping surface is a surface for crimping the first side wall portion of the crimp terminal to the core wire.
The second crimping surface is a surface for crimping the second side wall portion separated from the first side wall portion in the axial direction of the electric wire at the crimp terminal with respect to the coating.
The terminal with the terminal according to claim 1 or 2, wherein the moving body has a resin film attached to a portion of the core wire exposed to an external space between the first side wall portion and the second side wall portion. Electric wire manufacturing equipment. The support base is a lower mold that supports the crimp terminal from below.
The moving body is an upper mold that crimps the crimp terminal to the electric wire while descending toward the support.
The terminal according to any one of claims 1 to 3, wherein the crimping step of crimping the crimping terminal to the electric wire and the resin coating step of adhering the resin to the core wire are continuously executed. Electric wire manufacturing equipment. The process of covering the electric wire with terminals from above with the concave surface of the moving body,
A resin coating step of discharging a liquid resin from a passage opened in the concave surface to form a resin film on the concave surface and adhering the resin film to the core wire of the electric wire.
A method of manufacturing an electric wire with a terminal, which comprises.

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